Chemicals may be linked to a decrease in males otters' penis bone weight, scientists say.
Bumblebees can detect and distinguish electrical signals given by flowers to enhance discrimination and memory of floral rewards, a study suggests.
Audio slideshow: Discover a land of breathtaking scenery and remarkable adaptation
Eddie the otter is 15 years old and suffers from arthritis in his elbow so his keeper has come up with a novel way for him to improve movement in his joints - basketball.
Oceanic whitetip sharks return home to protected Bahamas waters, surprising scientists.
In pictures: Filmmakers capture the survival stories of Arabia's diverse wildlife
A royal penguin is being cared for at a Wellington Zoo after washing up on the coast of New Zealand, 2,000km (1,240 miles) from its Antarctic home.
Hundreds of fish are to be removed from part of the Kennet and Avon Canal for repairs to be carried out to lock gates.
Female Hottentot golden moles use penis size to gauge the suitability of male partners, scientists discover.
Marine biologists at St Andrews University say dolphins mimic the distinct whistles of their closest companions as a way of tracking them.
A 60-foot whale found washed up in Wigtown Bay on the Solway coast is buried close to where it died.
Some carnivorous plants act as blue "fluorescent lamps" to lure prey, according to scientists in India.
Scientists are working to reduce the noise levels and hazardous collisions that blight whale populations swimming off the northeast coast of the US.
The birth of a rare giant armadillo has been recorded for the first time in Brazil.
Scientists at a nature reserve in Somerset are baffled by a jelly-like slime which has appeared in a number of locations at the site.
Dozens of rescued birds washed up on the south coast covered in an oil additive are set to be released.
A large pod of dolphins proved to be an unexpected spectacle for tourists taking a boat trip near San Diego, California.
Seals are able to judge the size of an object using their whiskers, research shows.
A £1,000 reward is offered after two buzzards are shot dead and thrown in a ditch near an East Yorkshire village.
Almost a fifth of the world's reptile species are at risk of extinction, according to scientists.